HTML5 video tag cannot load src url

Hi, I’m developing an smart tv web app with tizen studio.

in real samsung tv, simple html

<video width="100%" height="100%" autoplay>
    <source src="https://.......mp4" type="video/mp4">

cannot load mp4 file by url. video.readyState always 0.
but few video mp4 urls are loaded and play well. (host addresses are all same)

my config.xml has

<access origin="*" subdomains="true"></access>
<tizen:content-security-policy>script-src 'self'</tizen:content-security-policy>
<tizen:privilege name= "" />

in this forum a few same cases were seen. but no clean reply there
can any one help this issue?